<html>
    <head>
        <title>我的首页</title>
        <meta charset="utf-8">
    </head>
    <body>
    <center>
        <h1>百度</h1>
        <input type="text">
        <input type="button" value="百度一下">
        <br>
        <a href="https://www.taobao.com">淘宝</a>
        <br>
        <a href="/reg.html">用户注册</a>
        <br>
        <table border="1">
            <tr>
                <td><a href="https://www.taobao.com">淘宝</a></td>
                <td>第二列</td>
                <td colspan="2" align="center">第三列</td>
            </tr>
            <tr>
                <td>第一列</td>
                <td rowspan="2">第二列</td>
                <td>第三列</td>
                <td>第四列</td>
            </tr>
            <tr>
                <td>第一列</td>
                <td>第三列</td>
                <td>第四列</td>
            </tr>
        </table>
    </center>
        <p>this is a html page</p>
    </body>
</html>